Wolfgang Hackbusch (born 24 October 1948 in Westerstede, Lower Saxony) is a German mathematician, known for his pioneering research in multigrid methods and later hierarchical matrices, a concept generalizing the fast multipole method. He was a professor at the University of Kiel and is currently one of the directors of the Max Planck Institute for Mathematics in the Sciences in Leipzig. Awards and honors 1994 Gottfried Wilhelm Leibniz Prize 1996 Brouwer Medal 1998 Plenary Speaker of the International Congress of Mathematicians Publications Multi-grid methods and applications, 1985, Springer Berlin, ; 2013 pbk reprint Elliptic Differential Equations: Theory and Numerical Treatment, 1992, Springer Berlin, Iterative Solution of Large Sparse Systems of Equations, 1993, Springer Berlin, Integral Equations: Theory and Numerical Treatment, 1995, Birkhäuser, Hierarchische Matrizen: Algorithmen und Analysis, 2009, Springer Berlin, Tensor spaces and numerical tensor calculus, 2012, Springer, Heidelberg The Concept of Stability in Numerical Mathematics, 2014, Springer, Leipzig References Stefan Sauter and Gabriel Wittum, On the occasion of the 60th birthday of Wolfgang Hackbusch, Computing and Visualization in Science 11(2008) 191 DOI 10.1007/s00791-008-0123-z External links Wolfgang Hackbusch at the Max Planck Institute for Mathematics in the Sciences in Leipzig 1948 births Living people People from Ammerland 20th-century German mathematicians Gottfried Wilhelm Leibniz Prize winners Brouwer Medalists 21st-century German mathematicians Max Planck Institute directors